Hapoo is correct. Front Projection systems are VERY costly. I've seen a projector that has a line quadrupler for like $60,000! But there are some in the thousands. Just keep in mind that if you get this system, you will probably get just that - a projector. You will have to buy extras like a tuner (if you get a computer projector), speakers, receiver, mounts, extra curtains around the house, etc...
Here's one made by Sony... MSRP is almost $5,000, but I think you can find it online for a lot cheaper...
Sony VPL-W400Q
http://www.sel.sony.com/SEL/consumer...em/index.shtml